Homework Duty Senior Airman Ryan Zeski uses time during a long flight as a passenger on a Michigan Air National Guard KC-135 Stratotanker to work on some homework for a course he is taking at Oakland University in Michigan, Nov. 8, 2018. SHARE IMAGE: Download Image: Full Size (0.28 MB) Photo By: Tech. Sgt. Daniel Heaton VIRIN: 181109-Z-VA676-158A.JPG Photo Gallery